Piezoelectric liquid pumps operate based on the properties of piezoelectric ceramics. By applying an AC voltage, the piezoelectric ceramics generate minute, high-frequency vibrations, which drive the pump membrane to move back and forth. This motion periodically alters the volume of the pump chamber, thereby drawing in and expelling fluid to achieve precise and continuous liquid delivery. Compared with traditional pumps, piezoelectric liquid pumps over multiple advantages, including a compact structure, precise control, low noise, and no electromagnetic interference.